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Calendar of Physics Talks Vienna
| Electrified plasma in AdS/CFT correspondence |
| Speaker: | Bindusar Sahoo (ICTP) |
| Abstract: | Strongly coupled plasma are quite interesting to study
within the framework of AdS/CFT, because of its possible relevance to
quark-gluon plasma one observes in heavy-ion collisions . Although the
plasma is studied by perturbing it and observing its linear responses,
sometimes the situation demands going beyond the linearized
approximation and taking back reactions to the gravity equations of
motion into account. In this talk I will focus on one of my
collaborative project in which we study a system which indeed needs
full back reactions on the metric. In this work we construct new
gravity backgrounds holographic dual to neutral plasma with U(1)
global symmetry in the presence of constant electric field,
considering its full back-reactions to the metric. As the electric
field and the induced current cause a net energy in-flow to the
system, the plasma is continually heated up and the corresponding
gravity solution has an expanding horizon. After proposing a
consistent late-time expansion scheme, we present analytic solutions
in the scheme up to next-leading order, and our solutions are new
time-dependent solutions of 5D asymptotic AdS
Einstein-Maxwell(-Chern-Simons) theory. To extract dual CFT stress
tensor and U(1) current from the solutions, we perform a rigorous
holographic renormalization of Einstein-Maxwell-Chern-Simons theory
including full back-reactions, which can in itself be an interesting
addition to literatures. As by-products, we obtain interesting
modifications of energy-momentum/current Ward identities due to the
U(1) symmetry and its triangle anomaly.
(For further info: http://www.univie.ac.at/lunch-seminar/) |
| Date: | Mon, 13.12.2010 |
| Time: | 12:00 |
| Duration: | 60 min |
| Location: | TU Wien, Wiedner Hauptstr. 8-10, yellow area, 9th floor, seminar room SEM 138C |
| Contact: | Nils-Ole Walliser |
| First Heavy-Ion Collisions at the LHC: a 'better than perfect' fluid? |
| Speaker: | Paul Romatschke (Frankfurt Institute for Advanced Studies) |
| Abstract: | The Large Hadron Collider has started its heavy-ion program with considerable success: results on the total number of particles, elliptic flow and jets have been published after only a few weeks of running. I will compare these results with predictions made on collisions at lower energies at RHIC and discuss the implications for the 'perfect fluid' paradigm of the Quark-Gluon Plasma. |
| Date: | Mon, 13.12.2010 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | Seminarraum 136, Institut f. Theor. Phys., TU Wien, Wiedner Hauptstr. 8-10, 10th floor |
| Contact: | Anton Rebhan, TU Wien |
| Das Jost-Schroer Theorem für Stringfelder |
| Speaker: | Sabina Alazzawi (Wien) (Fakultät für Physik) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 14.12.2010 |
| Time: | 14:15 |
| Duration: | 45 min |
| Location: | Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien |
| Contact: | J. Yngvason |
| Large isoperimetric surfaces in initial data sets |
| Speaker: | Michael Eichmair (MIT) (Fakultät für Physik) |
| Date: | Tue, 14.12.2010 |
| Time: | 14:30 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Straße 17, Zimmer 114, 1. Stock |
| Contact: | P. Chrusciel |
| Masselose Stringfelder zu beliebiger Helizität |
| Speaker: | Matthias Plaschke (Wien) (Fakultät für Physik) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 14.12.2010 |
| Time: | 15:00 |
| Duration: | 45 min |
| Location: | Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien |
| Contact: | J. Yngvason |
| Chiral dynamics with strange quarks in the light of recent lattice simulations |
| Speaker: | Veronique Bernard (CNRS Orsay) |
| Abstract: | im Rahmen des Teilchenphysikseminars |
| Date: | Tue, 14.12.2010 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien |
| Contact: | G. Ecker, H. Neufeld |
| Symmetric hyperbolic systems with distributional coefficients |
| Speaker: | Christian Spreitzer (Vienna) |
| Abstract: | im Rahmen des Literaturseminars |
| Date: | Thu, 16.12.2010 |
| Time: | 13:30 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe: Gravitation, Währinger Strasse 17, Seminarraum A, 2. Stock |
| Contact: | P. Chrusciel |
| Laser Spectroscopy of Hydrogen |
| Speaker: | The Nobel Laureate Professor Dr. Theodor W. Hänsch (Max-Planck-Institute of Quantum Optics, Garching, and Faculty of Physics, Ludwig-Maximilians-University, Munich, Germany) |
| Abstract: | The simple Balmer spectrum of atomic hydrogen has provided the Rosetta stone for deciphering the strange laws of quantum physics during during the early 20th century. Four decades ago, Doppler-free laser spectroscopy opened a new chapter in the exploration of hydrogen. Today, precision spectroscopy of hydrogen is reaching a precision of 15 decimal digits with the help of new spectroscopic tools including the laser frequency comb technique. However, the determination of fundamental constants and experimental tests of fundamental physics laws are now hindered by our insufficient knowledge of the rms charge radius of the proton. Recently, a laser measurement of the 2S-2P Lamb shift of muonic hydrogen has yielded an independent precise new value of the proton radius which differs by five old standard deviations from the official CODATA value. This discrepancy is subject of intense current discussions. It may be caused by a mistake, or it may indicate a dent in the armor of quantum electrodynamic theory. |
| Date: | Thu, 16.12.2010 |
| Time: | 15:00 |
| Duration: | 45 min |
| Location: | Fakultät für Physik der Universität Wien, Lise Meitner Hörsaal, 2. Stock Boltzmanngasse 5 1090 Wien |
| Contact: | Daniela Charlesworth |
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